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Vray Windows Problem
show user profile  cbflex
Hey so I'm basically stumped with this. I have no idea what the hell is causing this. Any help is greatly appreciated.
I'm trying to create a window material that's basically 100% see through with very slight reflection. I want it to be a day-time scene with sunlight and/or skylight to be entering the window and illuminating the interior. No matter what I do, the glass always tints the outdoors gray. I can't figure it out.
Using Irradiance as a first bounce and light cache as the second.
HSV Exponential color mapping with affect background on.
No HDRI maps anywhere.
Using Vray Sky.
The material's refraction is full white, glossiness 1.0, ior 1.0, max depth 5, fog color (black or white doesn't make a difference), fog multiplier 0.0, affect shadows on, Affect channels is color + Alpha.
Reflection Exit color (Black or white doesn't do anything for me), reflect is at full black, glossiness 1.0, diffuse (whatever I make the color, it doesn't do anything, using the blinn shader.
The window has 2 sides to it.
When I turn on the max overrides for environment it either only makes it darker or does nothing. Even when I increse the multiplier or add vray sky into the map tap.
I have tried changing all these values and nothing has worked.

bad window


EDIT: Interestingly enough, when I turn off the environment map entirely and leave it as just black, I get no tinting...
And when I leave the environment map off, but turn on reflection/refraction override, the sky outside is black but the sky through any glass is still this tinted blue. still doing more tests.
read 709 times
10/10/2011 5:54:10 PM (last edit: 10/10/2011 6:49:11 PM)
show user profile  Bolteon
errrr... tints the outdoors grey? what does the render look like without the glass there?


looking at your image a bit more, i'm guessing the right side has the window slid over and the left side is the issue youre running into?

rather than using the environment map for the vraysky map; try putting it into the texture slot on a vray dome light. and set the dome lights invisibility to off (should be off by default).

also, IOR of 1.0 doesn't exist for real glass. it's around 1.66 so keep it there if you want realistic results.

-Marko Mandaric

read 684 times
10/10/2011 8:17:40 PM (last edit: 10/10/2011 8:20:26 PM)
show user profile  cbflex
Yes, the right side is the window slid open so you can compare outside to inside. The left side is my problem.
I changed the ior to 1.66, thank you for that.
I tried your tip using the vray dome light, but it only produced the same exact results... What the hell is going on here?
I tried even a simple simulation. I created a shelled box with an opening and a plane in the opening with glass material and it gave me the same stuff. Any other ideas?
For some reason my glass just hates it when i have a sky model of any kind. when i have no sky model, the balcony at least isn't tinted.
read 678 times
10/10/2011 8:34:34 PM (last edit: 10/10/2011 8:37:17 PM)
show user profile  Bolteon
send it over...

marko [awt] markomandaric [dawt] com

-Marko Mandaric

read 675 times
10/10/2011 8:37:21 PM (last edit: 10/10/2011 8:37:21 PM)
show user profile  cbflex

I've included the textures used in the rendering.
read 669 times
10/10/2011 8:53:17 PM (last edit: 10/10/2011 8:53:17 PM)
show user profile  Bolteon

-Marko Mandaric

read 660 times
10/10/2011 9:41:45 PM (last edit: 10/10/2011 9:41:45 PM)
show user profile  cbflex
ok... wtf is this... Could someone please explain the meaning of this to me?
sky refraction test

The scene couldn't be any simpler. 2 planes, a teapot, a box, and vray sun and sky. Using HSV Exponential.
The floor plane is a vray material colored yellow or w/e. The box, plane and teapot all have vray materials also, and they all have refraction at 100% white. This is what I get. Someone please help!
Do I need to reinstall 3ds max and everything? I've never seen this kinda thing before!
read 658 times
10/10/2011 9:49:10 PM (last edit: 10/10/2011 9:49:10 PM)
show user profile  Bolteon
it's your computer...

just opened the scene and hit render. the only thing that was different from your base setup to what i have running is that the gamma was changed in the system prefs (mine is input of 2.2 and output of 1.0)

btw, vray 2.10.01 and max design 2012

-Marko Mandaric

read 652 times
10/10/2011 10:13:42 PM (last edit: 10/10/2011 10:21:10 PM)
show user profile  cbflex
thanks for the help!
read 648 times
10/10/2011 10:15:40 PM (last edit: 10/10/2011 10:15:40 PM)
show user profile  Bolteon
yeah, there's something wonky going on cause in that last image you posted... you can see the full correct env being refracted properly in the objects but it's as if they've been tinted darker.


-Marko Mandaric

read 645 times
10/10/2011 10:23:02 PM (last edit: 10/10/2011 10:23:02 PM)
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